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https://www.readbyqxmd.com/read/28731428/development-of-nasal-lipid-nanocarriers-containing-curcumin-for-brain-targeting
#1
Gustavo Richter Vaz, Gabriela Hädrich, Juliana Bidone, Jamile Lima Rodrigues, Mariana Corrêa Falkembach, Jean-Luc Putaux, Mariana Appel Hort, José Maria Monserrat, Antônio Sergio Varela Junior, Helder Ferreira Teixeira, Ana Luiza Muccillo-Baisch, Ana Paula Horn, Cristiana Lima Dora
BACKGROUND: Curcumin (CUR) has properties that can be useful for the treatment of Alzheimer's disease. Such properties are the inhibition of amyloid-β-protein (Aβ) aggregation, Aβ-induced inflammation, and activities of β-secretase and acetylcholinesterase. However, previous studies have revealed that CUR exhibited low bioavailability and difficulties in reaching the brain. OBJECTIVE: To overcome such drawbacks, this study aims at developing nasal lipid nanocarriers loaded with CUR to effectively target the brain...
July 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28730443/synthesis-of-plga-lipid-hybrid-nanoparticles-for-sirna-delivery-using-the-emulsion-method-plga-peg-lipid-nanoparticles-for-sirna-delivery
#2
Lei Wang, Benjamin Griffel, Xiaoyang Xu
The effective delivery of small interfering RNA (siRNA) to tumor cells remains a challenge for applications in cancer therapy. The development of polymeric nanoparticles with high siRNA loading efficacy has shown great potential for cancer targets. Double emulsion solvent evaporation technique is a useful tool for encapsulation of hydrophilic molecules (e.g., siRNA). Here we describe a versatile platform for siRNA delivery based on PLGA-PEG-cationic lipid nanoparticles by using the double emulsion method. The resulting nanoparticles show high encapsulation efficiency for siRNA (up to 90%) and demonstrate effective downregulation of the target genes in vitro and vivo...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28729400/vessel-targeted-chemophototherapy-with-cationic-porphyrin-phospholipid-liposomes
#3
Dandan Luo, Jumin Geng, Nasi Li, Kevin A Carter, Shuai Shao, G Ekin Atilla-Gokcumen, Jonathan F Lovell
Cationic liposomes have been used for targeted drug delivery to tumor blood vessels, via mechanisms that are not fully elucidated. Doxorubicin (Dox)-loaded liposomes were prepared that incorporate a cationic lipid; 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP), along with a small amount of porphyrin-phospholipid (PoP). Near infrared (NIR) light induced release of entrapped Dox via PoP-mediated DOTAP photo-oxidation. The formulation was optimized to enable extremely rapid NIR light-triggered Dox release (i...
July 20, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28725673/efficiency-data-of-intracellular-recombinant-protein-delivery-using-cationic-lipid-coated-silk-fibroin-particle
#4
Woo-Jin Kim, Bong-Soo Kim, Young-Dan Cho, Won-Joon Yoon, Jeong-Hwa Baek, Kyung-Mi Woo, Hyun-Mo Ryoo
This article presents data related to the research article "Fibroin particle-supported cationic lipid layers for highly efficient intracellular protein delivery" and focuses on the delivery efficiency aspects of the fibroin particle-cationic lipid complex (Fibroplex), including its fabrication and the intracellular delivery to the mouse skin tissue. We introduced a stable lipid-particle complex called "Fibroplex", formed by loading cargo protein onto a silk fibroin spherical particle core complexed with cationic liposomes to address the intracellular recombinant protein delivery...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28724926/enhanced-anti-metastatic-and-anti-tumorigenic-efficacy-of-berbamine-loaded-lipid-nanoparticles-in-vivo
#5
Priyambada Parhi, Sujit Suklabaidya, Sanjeeb Kumar Sahoo
Research on metastasis is gaining momentum for effective cancer management. Berbamine (BBM) has the potency to act as a therapeutic in multiple cancers and cancer metastasis. However, the major limitation of the compound includes poor bioavailability at the tumor site due to short plasma half-life. Here, our major objective involved development of lipid based nanoparticles (NPs) loaded with BBM with an aim to circumvent the above problem. Moreover its, therapeutic potentiality was evaluated through various in vitro cellular studies and in vivo melanoma primary and experimental lung metastatic tumor model in C57BL/6 mice...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724915/quinolinate-phosphoribosyltransferase-is-an-antiviral-host-factor-against-hepatitis-c-virus-infection
#6
Zhilong Wang, Yanhang Gao, Chao Zhang, Haiming Hu, Dongwei Guo, Yi Xu, Qiuping Xu, Weihong Zhang, Sisi Deng, Pingyun Lv, Yan Yang, Yanhua Ding, Qingquan Li, Changjiang Weng, Xinwen Chen, Sitang Gong, Hairong Chen, Junqi Niu, Hong Tang
HCV infection can decrease NAD(+)/NADH ratio, which could convert lipid metabolism to favor HCV replication. In hepatocytes, quinolinate phosphoribosyl transferase (QPRT) catabolizes quinolinic acid (QA) to nicotinic acid mononucleotide (NAMN) for de novo NAD synthesis. However, whether and how HCV modulates QPRT hence the lipogenesis is unknown. In this work, we found QPRT was reduced significantly in livers of patients or humanized C/O(Tg) mice with persistent HCV infection. Mechanistic studies indicated that HCV NS3/4A promoted proteasomal degradation of QPRT through Smurf2, an E3 ubiquitin-protein ligase, in Huh7...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28721817/improvement-of-thermosensitive-liposome-stability-by-cerasome-forming-lipid-with-si-o-si-network-structure
#7
Qin Su, Ximing Pu, He Bai, Xianchun Chen, Xiaoming Liao, Zhongbing Huang, Guangfu Yin
BACKGROUND: Liposomes have been widely used in the gene transfection and the drug delivery systems due to their excellent biocompatibility and encapsulation ability, especially, the ability to deliver the gene/drug into the cells via the membrane fusion. Thermosensitive liposoems have been proven to be a precise and effective method for cancer treatment in many preclinical studies. But the imperfect crystalline arrangement between grains occurred, resulting in planar defects at the boundaries of membranes, compromising the stability of thermosensitive liposomes...
July 19, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/28717350/properties-of-native-high-density-lipoproteins-inspire-synthesis-of-actively-targeted-in-vivo-sirna-delivery-vehicles
#8
Kaylin M McMahon, Michael P Plebanek, C Shad Thaxton
Efficient systemic administration of therapeutic short interfering RNA (siRNA) is challenging. High-density lipoproteins (HDL) are natural in vivo RNA delivery vehicles. Specifically, native HDLs: 1) Load single-stranded RNA; 2) Are anionic, which requires charge reconciliation between the RNA and HDL, and 3) Actively target scavenger receptor type B-1 (SR-B1) to deliver RNA. Emphasizing these particular parameters, we employed templated lipoprotein particles (TLP), mimics of spherical HDLs, and self-assembled them with single-stranded complements of, presumably, any highly unmodified siRNA duplex pair after formulation with a cationic lipid...
November 15, 2016: Advanced Functional Materials
https://www.readbyqxmd.com/read/28712927/role-of-hepatic-annexin-a6-in-fatty-acid-induced-lipid-droplet-formation
#9
Rose Cairns, Anna Alvarez-Guaita, Inés Martínez-Saludes, Sundeep J Wason, Jacky Hanh, Shilpa R Nagarajan, Elham Hosseini-Beheshti, Katia Monastyrskaya, Andrew J Hoy, Christa Buechler, Carlos Enrich, Carles Rentero, Thomas Grewal
Annexin A6 (AnxA6) has been implicated in the regulation of endo-/exocytic pathways, cholesterol transport, and the formation of multifactorial signaling complexes in many different cell types. More recently, AnxA6 has also been linked to triglyceride storage in adipocytes. Here we investigated the potential role of AnxA6 in fatty acid (FA) - induced lipid droplet (LD) formation in hepatocytes. AnxA6 was associated with LD from rat liver and HuH7 hepatocytes. In oleic acid (OA) -loaded HuH7 cells, substantial amounts of AnxA6 bound to LD in a Ca(2+)-independent manner...
July 13, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28712916/targeting-lipodisks-enable-selective-delivery-of-anticancer-peptides-to-tumour-cells
#10
Sara Ahlgren, Karin Reijmar, Katarina Edwards
Issues concerning non-specificity, degradation and haemolysis severely hamper the development of membranolytic amphiphilic peptides into safe and efficient anticancer agents. To increase the therapeutic potential, we have previously developed a strategy based on formulation of the peptides in biocompatible nanosized lipodisks. Studies using melittin as model peptide show that the proteolytic degradation and haemolytic effect of the peptide is substantially reduced upon loading in lipodisks. Here, we explored the possibilities to increase the specificity and boost the cytotoxicity of melittin to tumour cells by use of targeting lipodisk...
July 13, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28708392/thiol-triggered-release-of-intraliposomal-content-from-liposomes-made-of-extremophile-inspired-tetraether-lipids
#11
Takaoki Koyanagi, Jessica L Cifelli, Geoffray Leriche, David Onofrei, Gregory P Holland, Jerry Yang
Liposomal drug delivery systems have been used for delivery of drugs to targeted tissues while reducing unwanted side effects. DOXIL®, for instance, is a liposomal formulation of the anti-cancer agent doxorubicin (DOX) that has been used to address problems associated with non-specific toxicity of free DOX. However, while this liposomal formulation allows for a more stable circulation of doxorubicin in the body compared with free drug, efficacy for cancer therapy is reduced when compared with systemic injections of free drug...
July 14, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28703643/methotrexate-and-beta-carotene-loaded-lipid-polymer-hybrid-nanoparticles-a-preclinical-study-for-breast-cancer
#12
Ashay Jain, Gajanand Sharma, Varun Kushwah, Neeraj K Garg, Prashant Kesharwani, Gargi Ghoshal, Bhupinder Singh, Uma Shankar Shivhare, Sanyog Jain, Om Prakash Katare
AIM: This work was intended to investigate the targeting potential of fructose-tethered lipid-polymeric hybrid nanoparticles (F-BC-MTX-LPHNPs) co-loaded with beta carotene (BC) and methotrexate (MTX) in breast cancer therapeutics and find out the possible protective role of BC on MTX-induced toxicity. MATERIALS & METHODS: F-BC-MTX-LPHNPs were fabricated using self-assembled nano-precipitation technique. Fructose was conjugated on the surface of the particles. The in vitro cytotoxicity, sub-cellular localization and apoptotic activity of F-BC-MTX-LPHNPs were evaluated against MCF-7 breast cancer cells...
July 13, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28703281/topotecan-loaded-lipid-nanoparticles-as-a-viable-tool-for-the-topical-treatment-of-skin-cancers
#13
João Hélio Venâncio, Lígia Marquez Andrade, Najla Locatelli Santos Esteves, Lara Barroso Brito, Marize Campos Valadares, Gisele Augusto Rodrigues Oliveira, Eliana Martins Lima, Ricardo Neves Marreto, Tais Gratieri, Stephânia Fleury Taveira
OBJECTIVES: This work aimed to evaluate semisolid formulations containing topotecan (TPT) loaded nanostructured lipid carriers (NLC) for topical treatment of skin cancers, as TPT is effective against a variety of tumours. A formulation which increases TPT skin permeation would be extremely desirable. METHODS: TPT-NLC were prepared and incorporated in hydrogels with hydroxyethyl cellulose and chitosan (TPT-NLC-HEC and TPT-NLC-Ch, respectively). Control formulations were obtained by dispersing TPT in HEC and Ch hydrogels (TPT-HEC and TPT-Ch)...
July 13, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28702990/the-relationship-of-amphipathic-beta-structures-in-the-beta-1-domain-of-apolipoprotein-b-to-the-properties-of-the-secreted-lipoprotein-particles-in-mca-rh7777-cells
#14
Medha Manchekar, Richa Kapil, Zhihuan Sun, Jere P Segrest, Nassrin Dashti
Our previous studies demonstrated that the first 1000 amino acid residues (the βα1 domain) of human apolipoprotein (apo) B-100, referred to as apoB:1000, are required for the initiation of lipoprotein assembly and the formation of a monodisperse stable phospholipid (PL)-rich particle. The objectives of this study were to: a) assess the effects on the properties of apoB truncates undergoing sequential inclusion of the amphipathic β strands in the N-terminal 700 residues of the β1 domain of apoB-100, and b) identify the subdomain in the β1 domain that is required for the formation of a microsomal triglyceride transfer protein (MTP)-dependent triacylglycerol (TAG)-rich apoB-containing particle...
July 13, 2017: Biochemistry
https://www.readbyqxmd.com/read/28698149/gelatin-modified-lipid-nanoparticles-for-anti-retroviral-drug-delivery
#15
Joshy K S, Snigdha S, Nandakumar Kalarikkal, Laly A Pothen, Sabu Thomas
The major challenges to clinical application of zidovudine are its moderate aqueous solubility and relative short half-life and serious side effects due to frequent administrations. We investigated the preparation of zidovudine-loaded nanoparticles based on lipids which were further modified with the polymer gelatin. Formulation and stability of the modified nanoparticles were analysed from the physico-chemical characterizations. The interactions of nanoparticles with blood components were tested by hemolysis and aggregation studies...
July 8, 2017: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/28684902/enzymatic-synthesis-and-in-vitro-evaluation-of-folate-functionalized-liposomes
#16
Bohong Guo, Danqiao Xu, Xiaohong Liu, Jun Yi
In this study, folate-poly(ethylene glycol)3400-cholesterol conjugates (FA-PEG-Chol) were enzymatically synthesized in one step and incorporated into liposomes to prepare folate (FA)-functionalized liposomes for targeted drug delivery. The FA-functionalized liposomes loaded with betulinic acid (BA) (FA-L-BA) were prepared by thin lipid film method. The FA-L-BA was characterized by their morphology, particle size, zeta potential, encapsulation efficiency (EE), stability, cell cytotoxicity and cellular uptake...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28684169/a-potential-non-invasive-glioblastoma-treatment-nose-to-brain-delivery-of-farnesylthiosalicylic-acid-incorporated-hybrid-nanoparticles
#17
Emine Sekerdag, Sevda Lüle, Sibel Bozdağ Pehlivan, Naile Öztürk, Aslı Kara, Abbas Kaffashi, Imran Vural, Ilkay Işıkay, Burҫin Yavuz, Kader Karlı Oguz, Figen Söylemezoğlu, Yasemin Gürsoy-Özdemir, Melike Mut
New drug delivery systems are highly needed in research and clinical area to effectively treat gliomas by reaching a high antineoplastic drug concentration at the target site without damaging healthy tissues. Intranasal (IN) administration, an alternative route for non-invasive drug delivery to the brain, bypasses the blood-brain-barrier (BBB) and eliminates systemic side effects. This study evaluated the antitumor efficacy of farnesylthiosalicylic acid (FTA) loaded (lipid-cationic) lipid-PEG-PLGA hybrid nanoparticles (HNPs) after IN application in rats...
July 3, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28681330/antiproliferative-activity-and-vegf-expression-reduction-in-mcf7-and-pc-3-cancer-cells-by-paclitaxel-and-imatinib-co-encapsulation-in-folate-targeted-liposomes
#18
Marco Júnio Peres-Filho, Alexandre Pereira Dos Santos, Thais Leite Nascimento, Renato Ivan de Ávila, Fabrícia Saba Ferreira, Marize Campos Valadares, Eliana Martins Lima
Co-encapsulation of anticancer drugs paclitaxel and imatinib in nanocarriers is a promising strategy to optimize cancer treatment. Aiming to combine the cytotoxic and antiangiogenic properties of the drugs, a liposome formulation targeted to folate receptor co-encapsulating paclitaxel and imatinib was designed in this work. An efficient method was optimized for the synthesis of the lipid anchor DSPE-PEG(2000)-folic acid (FA). The structure of the obtained product was confirmed by RMN, FT-IR, and ESI-MS techniques...
July 5, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28678859/myosin-1-inhibition-by-pclp-affects-membrane-shape-cortical-actin-distribution-and-lipid-droplet-dynamics-in-early-zebrafish-embryos
#19
Prabuddha Gupta, René Martin, Hans-Joachim Knölker, Deepak Nihalani, Deepak Kumar Sinha
Myosin-1 (Myo1) represents a mechanical link between the membrane and actin-cytoskeleton in animal cells. We have studied the effect of Myo1 inhibitor PClP in 1-8 cell Zebrafish embryos. Our results indicate a unique involvement of Myo1 in early development of Zebrafish embryos. Inhibition of Myo1 (by PClP) and Myo2 (by Blebbistatin) lead to arrest in cell division. While Myo1 isoforms appears to be important for both the formation and the maintenance of cleavage furrows, Myo2 is required only for the formation of furrows...
2017: PloS One
https://www.readbyqxmd.com/read/28678269/diruthenium-ii-iii-metallodrugs-of-ibuprofen-and-naproxen-encapsulated-in-intravenously-injectable-polymer-lipid-nanoparticles-exhibit-enhanced-activity-against-breast-and-prostate-cancer-cells
#20
Samara R Alves Rico, Azhar Z Abbasi, Geise Ribeiro, Taksim Ahmed, Xiao Yu Wu, Denise de Oliveira Silva
A unique class of diruthenium(ii,iii) metallodrugs containing non-steroidal anti-inflammatory drug (NSAID), Ru2(NSAID), have been reported to show anticancer activity in glioma models in vitro and in vivo. This work reports the encapsulation of the lead metallodrug of ibuprofen (HIbp), [Ru2(Ibp)4Cl] or RuIbp, and also of the new analogue of naproxen (HNpx), [Ru2(Npx)4Cl] or RuNpx, in novel intravenously (i.v.) injectable solid polymer-lipid nanoparticles (SPLNs). A rationally selected composition of lipids/polymers rendered nearly spherical Ru2(NSAID)-SPLNs with a mean size of 120 nm and zeta potential of about -20 mV...
July 5, 2017: Nanoscale
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